Very little time with 3dbuilder, cut, copy, paste! And is 45mm ..
It works well with 300 gram reels but with 1 kilo the chip is disconnected and the cube indicates that I have 30 seconds to put the cartridge back!

I haven't had a disconnect from the larger spool, but I can certainly detect the strain.

I am suggesting that a full stock spool is about the limit for the lever this creates.
After that, it needs a support on the outside of the spool. A simple post may do.
This might be a good use of the two holes in the front of the clamp.

P3D; For the stock spool, I used 1.3" clearance for holding the spool.
I can make a quick stretch of the new "Adder" filament despooler.
Just let me know how thick that spool is.

The last skunk-works print files you have is a 1kg clamp.
That is what the locks are for in the clamp.
It works fine for 1kg but it needs a support under the outer end.
If you make a post to support the cap, you're done.

I still need to test your last clamp but woud love to have 1kg suppot too...Or i may try the respooler that french user uploaded here.....

Acutely I'm a Syrian user but I live in France

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@Tommy
Thanks a lot for the extruder hub ,, you did a great job
Do you plan to upload your design as stl ,, I have some ideas for some modification but I dont have time to start from zero , if you can share your design as stl it will be easier to make some modifications

I'm all for the challenge of reverse engineering a .cube3 files.
I want that to be successful. The more people learn about the 3DS encoding, the better.

However, there are fundamental reasons I will not share my core designs. I would ask that be respected.
Copy all you want... that too is encouraged. I'll even give you the critical numbers as needed.
I do this for a living, and in my circles, collaboration is always rewarded. Taking over is a recipe for failure.

Practical reasons for the .cube3 files includes appropriate orientation for certain features.
No guessing or experimenting on settings I haven't tested yet, or will never test.
No having to ask 20 questions before even contemplating a query about a specific print... shall I go on?
Okay, maybe M. can overwrite global settings, but for the most part, if you print the .cube3 file, it will work!

Saying that, please share what you are thinking and I would consider incorporation the mod for you to test with due credit.

last a try it works great, i use extruder with original before, add tube for filament stand,
i think add small metal (2 pcs, same with original catrigge) will be more strong hold, maybe? or i'm wrong, i try to mod from file that i'm print, cause just .cube i have.